Judging from the news of various spoilers, the new iPhone that will be launched soon does not seem to be equipped with the rumored Micro LED display panel, but will adopt the strategy of OLED+LCD dual display panel to launch a "customized" version in China.
Sony, which was the first to research and commercialize Micro LED, was also rumored to use Micro LED on its own BRAVIA TV. However, Sony executives said that Micro LED is not suitable for home TVs at this stage, and Sony is promoting it to outdoor TVs. Display and other commercial fields.
In fact, the appearance of Micro LED is not too late. It is always discussed, but it has never been found in the consumer field. Why is it?
Micro LED is actually the ultimate evolution of LED
TFT-LCD began to flourish in the 1990s. Due to the high color saturation, power saving, and thinness of LEDs, some manufacturers use LEDs as backlights. In 2000, the process, efficiency, and cost of white light LED technology began to mature gradually. In 2008, white light LED backlight modules grew rapidly, almost completely replacing CCFL, and were widely used in mobile phones, tablets, notebooks, and TVs.
However, the non-self-luminous display principle of TFT-LCD has low photoelectric efficiency, and the color saturation of white light LED is not as good as that of RGB-LED, and the active brightness is difficult to reach the 1000nit required by outdoor environment. At this time, Micro LED technology that directly uses three primary color LEDs as self-luminous displays began to appear.
The 55-inch "Crystal LED Display" released by Sony in 2012 adopted Micro LED Display technology. Adopting a single Micro LED embedding method, there is no response time and service life problem, and the color gamut is as high as 140% NTSC.
Do you know why Apple is always rumored to produce Micro LED mobile phones? Because as of 2016, Apple has acquired 4 companies with Micro LED patents.
Micro LED has these characteristics
The longest discussed topic is OLED and Micro LED. Theoretically, OLED has improved the LCD's need for a backlight module, poor black level, and has a higher contrast. But OLED also has shortcomings, that is, the display of white screens must be reduced to save power consumption, and the color gamut level of OLED is not much different from KSF or quantum dots.
However, Micro LED is composed of a tiny LED array. In addition to achieving high brightness, ultra-high resolution and color saturation, each pixel can be driven independently, and it also has the advantages of power saving and fast response speed.
But it is still on the road to commercial use. His technical bottleneck has two aspects. One is how to make smaller units of LED particles, and the second is how to transfer these micron-level LEDs to the substrate, how to bond them, and how to drive the circuit. Of course, the last thing is how to reduce the cost.
The most suitable application scenarios for Micro LED at this stage
There are still many technical bottlenecks in the development of Micro LED, but no matter what, he still has a development direction and a driving force for progress. The most likely to be widely used are on wearable devices and virtual display devices.
Smart wearable devices. For example, smart watches, the screen is relatively small, and the density of the screen is relatively high. So it is in line with the characteristics of Micro LED. They have potentially differentiated features, including the ability to extend battery life, reduce power consumption and higher brightness, thereby providing good readability in outdoor environments.
Consumers who have experienced such products with AR and MR head display are definitely the clearest. The biggest development bottleneck of head-mounted display equipment is the resolution of the real screen. Higher resolution can make the virtual screen closer to the real world. There is enough brightness and enough real color performance. The quality of these panels may be 10 times higher than the best mobile phones on the market, for example, the brightness must reach 10000nit. Only Micro LED has such potential.
In addition, Micro LED can also be used in head-up displays in automobiles and other environments, similar to a way of AR display.
Will it be applied in the large screen area? Of course, its small size and high-contrast display are also very suitable for future large-screen TVs or monitors with ultra-high resolution. If the cost drops, it can really kill all kinds of OLED and LCD display devices.
Summary: The application range of Micro LED is very rich, but it is still in its infancy, and the birth of a new display technology is often accompanied by a new supply chain relationship. Including upstream material manufacturers, midstream panel manufacturers, and downstream brand terminals. Each link is a process of upgrading, so this process is definitely not fast. We can only wait patiently.
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